Motor-driven street-sweeper



.C. W. LUND.

MOTOR DRIVEN STREET SWEEPER.

' APPLlCATlON FILED APR. H. 1919.

1,374,933. P3tented"Apr- 19,1921.

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MOTOR DRIVEN STREET SWEEPER.

APPLICATION FILED APR.I1,1919.

1,374,933. Patented Apr. 19, 1921;

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MOTOR DRIVEN STREET SWEEPER. APPLICATION FILED APR, H, 1919.

1,374,933. Patented Apr. 19, 15 21..

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C. W. LUND.

MOTOR DRIVEN STREET SWEEPER.

APPLICATION.F|LED APR. H. 1919.

Patented Apr. 19, 1921.

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MOTOR DRIVEN STREET SWEEPER. APPLICATION FlLED APRI II. I919.

1,374,933. v I Patented Apr. 19, 1921.

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APPLICATION FILED APR, 1 1 1 9 1 9.

Patented Apr. 19, 1921.

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C. W. LUND.

MOTOR DRIVEN STREET SWEEPER.

APPLICATION FILED APR- H, 1919.

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7 SHEETS-SHEEY 7- mm E l Patented Apr. 19, 1921.

UNITED STATES PATENT OFFICE.

CHARLES WALTER LUND, OF WILLOWS, CALIFORNIA MOTOR-DRIVEFI STREET-SWEEPER.

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i 0 (l -Z2 Q0/1077? it may concern- Be it known that 1 CHARLES W. LUND,

citizen of the United States, residing at Willows, in the county of Glenn and State of California, have invented certain new and useful Improvements in Motor-Driven Street tiweepers; and I do declare the following to be a full, clear, and exact descrip tion of the invention, such as will enable others skilled in the art to which it appertains to make and use thesame.

My invention has for. its principal object toprovide a highly eflicient and durable,

motor propelled machine for sweeping streets and carrying the sweeplngs to any required point for unloading.

In carrying out the above end, further objects are to provide for clean sweeping even on streets having irregular surfaces; to provide a brush which will not only sweep the streets, but .create a strong current of air to sacking the sweepings and unloading the.

filled sacks; to provide for cleaning and adjustment of the brushv as required; and to provide novel trucks carrying the front wheels of the machine. 1

Nith the foregoing in view, the invention resides in the novelfeatures of construction, and unique combinations of parts, hereinafter fully described and claimed, reference being made in the descriptive matter to the drawings described below.

Figure 1 is a side elevation of a machine constructed in accordance with my inven tion;

Fig. 2 is an end elevation;

Fig. 3 is substantially a central vertical longitudinal section;

Fig. 3 is a detail transverse section on the plane indicated by the line 3 3 of Fig. 3;

Fig. 4 is a vertical transverse section taken substantially on the irregular line iof Fig. 3, showing more particularly the construction of the rotary brush; Fig. 5 is a vertical transverse section on the plane of the line 5-5 of Fig. 3; g

6 is a transverse section through the receiving compartment, and the sack racks and air outlet means thereof, taken on the plane of line 6-6 of Fig. 3;

-$pecification of Letters Patent. Patented 1 A1313 19, 1921; AppIication filed April 11, 1919. Serial No. 289,326. i i i i Fig. 7 is a side elevation with parts broken away and in'section, showing one of the front wheel. trucks;

Flg. 8 is a horizontal section on the plane of the line 8-8 of Fig. 7;

Figs. 9 and lOiare vertical transverse sections on the planes designated by the lines 9+9 and lOj-lO respectively ofFig. 7.1

Reinforced by any appropriate frame structure, is a housing 1 of suitable size and shape, mounted on front and rear wheels'2 and 3, the former being driven whilev the .erably located in a cab6, and the steering wheel 7, together with'allother' controls,

are suitably located within reach of the 1 driver.

One adapted tosdrive the front wheels 2, while the power from the other motor is utilized for swiftly rotating the brush yeti tobe described For illustrative purposes, I have:

shown sprocket, chains 8 connecting the front wheels 2 with a transverse jack shaft 9. which is driven by any preferred or well known means from one. of the motors; and.

of the motors above mentioned is anotherfshaft .10 and sprocketchains 11 i are provided for driving the brush.

The front whee1s2 mightwell be mounted in anysuitable manner, but this is, preferably done by means oftrucks 12, one of which is detailed in Figs. '7 to 10. Thefront and rear brackets 13 and 13 respectively are rigidly secured to the sides of the housing 1 or to the frame of such housing as required. and each of said brackets includes a base 14, an inner sidebar 15, and an outer: side bar 16, the two bars 15 and 16 of each bracket being parallel throughout. the

greater part of their lengths and being by preference secured together at their upper ends as clearly shown in Figs. 2,9. andlO. Two parallel horizontal bars 17 eXtend between the 'twobrackets 13and 13? and contact with the inner sides of the bars 15 and 8 and in addition, a U-shaped spacing bar 21 is by preference employed, the base of said bar being secured at 22 to the base 14 of the bracket 13, while the upturned ends 23 of said bar 21 are disposed for contact with the inner sides of the bars 17 as illustrated in Figs. 7, 8 and 10. The pin 18 passes through the ends 23 and said ends serve to, guide the bars 17 in their pivotal movement upon the pin 18.

At their rear ends, the bars 17 are connected by a U-shaped bar 24 whose ends are riveted thereto at 25. (See Fig. 9). The bar 24 and the base 14 of the bracket 13 are provided with alined openings" through which vertical bolts 26 extend, said bolts rising above the bars 17 and carrying an abutment 27. Coil springs 28 are interposed between the abutment 27 and the bar 24 and it will thus be seen that since the wheel 2 is mounted between the bars 17, vertical movement of said wheel with respect to the remainder of the machine is vieldably resisted by the springs 28. The entire front end of the machine is thus mounted in a manner to permit the front wheels to drop into depressions or ride over obstructions, without warping or exerting a torsional actionon the entire machine. The rear end of the machine is supported yieldably by means of springs 29 from the axle 30 of the wheels 3, and these parts are preferably located beneath the rearwardly projecting portion 31 of the housing 1.

The interior of the housing 1 is divided by front and rear transverse partitions 32 and 33, into a front brush compartment B, an intermediate receiving compartment R, and a dust collecting or dead airchamber C, the latter being located in the extended end 31 of the housing. In the compartment B, a rotary street sweeping brush 34 is mounted for sweeping the street and forcing the sweeping into the receiving chamber R, in a current of air generated by said brush; the compartment R is honeycombed with racks 35 to support sacks 36 in open position to receive the sweepings; and the chamber C merely forms a dead air space in which the dust settles and from which it may be removed through the door 37 indicated in Fig. 1. I

To permit the air of the current generated by therotating brush 34 to escape, without carrying dust and the like from the housing 1, I make novel improvision. A sheet or sheets of rather open mesh textile fabric 38 is positioned longitudinally in the'upper portion of the housing 1 and is secured to the top of the latter upon spaced transverse lines 39 as will be clear from Figs. 3 and 6. The fabric 38 droops between the lines of fastenings 39 and thus forms a plurality'of air outlet conduits 40 extending transversely across the interior of the housing 1 and communicating at their ends with the atmosphereby means of slots 41 stamped or otherwise form d in the sides of the housing. Due to the nature of the material of which the conduits 40 are formed air may readily escape into said conduits and thence to the open air through the slots 41 (see Fig. 6). No dust or the like can enter the conduits to leave with the escaping air, the result being that this dust settles partly in the sacks 36, but principally in the "dead .air chamber C. To prevent collapse of the conduits 40, they are preferably provided with V-shaped skeletons 40 formed of screen wire or the like. These skeletons retain the textile fabric 38 stretched in proper position for most effective screening of the outgoin air.

Each rack 35, above mentioned, consists of a rectangular base 42, rods 43 rising from and secured to said base, and a rectangular angle iron frame 44 secured to the upper ends of said rods. The severalframes 44 are disposed in a common plane inclining upwardly from the partition 32 to the rear partition 33, and thus the sacks 36 are so held as to readily receive the sweepings thrown rearwardly by the brush 34. The

angle iron frames 44 are disposed in abutting relation with their corners positioned upwardly so that they provide eflicient means for guidingv the sweepings into the sacks; and the latter may be supported in the racks in any preferred manner, for instance by the prongs 45 carried by the rods 43. I

The receiving chamber R is provided with a solid bottom 46 and with an endless conveyer 47 operating over said bottom and around sprockets 48 on longitudinal shafts 49, the upper part of the conveyer serving to support the racks 35. Doors 50 are provided in the sides of the housing 1, at the ends of the receiving compartment R and by openingone door or the other and driving the conveyer47, toward such door, the several racks 35 and the loaded sacks carried thereby may be shifted to either side of the machine for unloading, after which they may again be placed upon the conveyer 47 and returned to their initial places by proper movement of said conveyer.

Any adequate construction could be employed for operating the conveyer 47, but for illustrative purposes I have shown both shafts 49 provided with beveled gears 51 meshing with similar ears 52 on suitably mounted vertical sha ts 53 having hand wheels 54. One hand wheel 54 and associated parts are provided at each side of the machine so that the conveyer may be operated without going from one side to the other. i

The rotary brush 34 in the open bottomed compartment B, is mounted in an approximately cylindrical casing 55 and the line of what on a tangent and it is through this" outlet that the sweepings are forced in a current of air, into the receiving compartment R, as indicated by the arrows in Fig. 3. A sheet 57 of canvas or other flexibleniaterial extends from the front edge of the outlet56 t0 the top of the compartment 13 and is secured to both so that vertical adjustment of the brush and'its casing 55 is allowed, and the sweepings effectively guided into the receiving compartment regardless of the extent of adjustment. The portion 58 of the peripheral wall of the casing 55, at the rear edge of the outlet 56, maybe hinged at 59 or otherwise mounted so that it may be moved inwardly against the ends of' the brush bristles, and since these bristles travel toward the free edge of the portion 58, they may be effectively cleaned of any material which may have lodged there on, whenever necessary. Any adequate means may be employed for depressing the yieldable wall portion 58, but for illustra-' tive purposes I have shown a lever 60 and link 61, the former being accessible from the drivers seat.

The bottom of the casing is formed with an opening 62 through which the brush 34 protrudes for contact with the street, and at the front, rear and ends of this opening, suitable curtains 63 depend from the By forming the bottom 68 of belting or the like, it will readily adapt itself to irregular street surfaces, being continually forced down by the brush bristles and will. thus readily receive all sweepings gathered by the brush 84. 'One or more levers 69 may be suitably connected with the dustpan 648 for raising and lowering the same as required, and said lever or levers may well be operated by a rod 70 and lever '71 from the drivers seat.

When sweeping dry and dusty streets, it is preferable to moisten the brush 34, and for this purpose I have shown a water spray bristles 94.

pipe 72 located in the rear part of the casing 55 and supplied with water from a tank 73 which may well be located in front of the conduits 40. Any adequate connections may be provided between the tank and thespray pipe and I have shown ordinary piping for this purpose, including a flexible section 74 to permit raising and lowering of the brush and its casing. A suitable valve 75 is provided for controlling the, flow of water and for cutting it off entirely when required.

In the preceding, I have referred to vertical adjustment of the brush 34 and its casing 55, necessitating the flexible sheet 57 and the hose 74, and although such raising and lowering could be efi ectedby any adequate means, I prefer the construction described below. A pair of longitudinal levers 76 are riveted or otherwise secured as at .177 tothe ends of the casing 55 and the rear ends of said levers are fulcriiincd upon the frame of the machine as indicated at 7 8 in Fig. 3. Screw jacks 79 are provided foi raising and lowering the frontends of the levers 76 as required and suitable means are employed for adjusting both jacks simultaneously. I In the present form of the machine, I have shown a transverse-shaft 80 which operates the jacks 79 by means of gearing 81 as seen most clearly in Fig. 2,. and by any suitable arrangement, such as a vertical shaft 82 and hand wheel 83, the

shaft 80 may be turned by the driver whenever it is required that the brush and easing be either raised or lowered. I y c The brush 34 could well be of any preferred construction, but is preferably of the form disclosed more particularly in Figs. 3, 4 and 5. The central shaft 84 of the brush is rotatably mounted in suitable bearings 85 carried by the bars 76 and is driven by the chains 11 above described; and at Suitable intervals, hubs 86 are keyed on said shaft tocarry rigid radial arms 87 upon which brush heads 88, extending parallel with the shaft 84, are slidably mounted I as most clearly illustrated in Figs, 3 and 5.

Jack screws 89 are secured to the brush heads 88 and are, slidably received in tubular arms 90 radiating from additional hubs ed on said screws 89 and bear against the outer ends of the arms 90. Bevel gears 93 which are mounted on and rotatable with re-,

"spect 'tothe shaft 84, mesh with the pinions 92 for rotating them in unison and it will 91 on the shaft 84, and pinions 92 are threadarms 97 secured to said shaft 84.

A crank r the like 98 may be provided for turning shaft 96 as required.

I preferably attach the brush bristles 94: to the heads 88 in tae manner illustrated more particularly in Figs. 3 and 4. The edges of each head are channeled to a slight extent for proper contact with channeled metal bars 99, between which and bars 100, the bristles are clamped by bolts 10]. passing through the bars and 100 and the intervening bristles. Longer holds 109 pass tirough these parts and through the heads 88 to secure the former to the latteiint the same t me permitting easy detachment th reof when necessary. all of the brist should become bowed in one liroction from continual operation, the bolts 10:2, may be removed so that reversal oi such bristles is possible, to exert strain thereon in the op posite direction. b

Although the operation of the machine will probably be understood iron; the "foregoing, it may be briefly described as follows:

By means of one of the motors, the machine is propelled along the street, the power from the other motor being utilized for rapidly rotating the brush 3%. This brush thoroughly sweeps the street and by means of the dust-pan (Seithe sweepings are directed into the casing 55, and are partly thrown from the latter by centriigal force, and partly blown by the air current generated by the brush. through the outlet 56 into the receiving compartment. 7 a

The sweepings are deposited in the l 36 and the air, but no dust, escapes throng the several conduits 40, some of the dust settling in said sacks, while the remainderis collected in the dead air chamber if. *hen the sacks are filled, the jacks T9 in be operated to bodily raise the brush and the casing 55, and driving of said brush may then be discontinued. The machine may now travel to any preferred point at which the sweepings to l e unloaded and when such point is reached, one or the other of the doors 50 is opened so that the racks and the loaded ba 's 36 carried thereby are accessible. The nrst row of racks is now removed and emptied, the conveyor 47 is next operated to position the next row at the open door for removal, and this operation is r-ontinued until all of the racks have been removed. The sacks are removed from the racks'and closed, and said racks are returned to the compartment it after suspending other sacks therein. I roper manipulation of the conveyor a? 's of assistance in returning the racl-zs as well as removing them. The machine is now in condition tor further use when the brush and its casing are again lowered to operative position, and it will be understood that whenever necessary the water spray from the pipe 72 may a an longated wheeled housing, a, transverse pa tron divid ng said housing into a front brush compartment and a rear re .eiving compartment, said partition terminating in spaced relation to the top of the housing, a

transverse substantially cylindrical brushcasing in said brush compartment having an outlet opening in its top, the portion of the casing behind said outletopening extending downwardly to said partition and being hinged to allow vertical swinging of the brush casing within said housing, a combined brush and fan mounted in said brush casing and exposed at the lower side thereof for sweeping the street and blowing the sweepings-through said outlet opening into the compartment, and a flexible sheet inclined, rearwardly from the trout edge of the aforesaid outlet opening to the top of the housing to guide the sweeping-s into the receiving compartment and permit vertical movement of said brush casing.

A street sweeping machine comprising a horizontally elongated wheeled housing,

a partition dividing said housing into a front brush compartment and a rear receiving compartment, said housinghaving at its rear end a dead air chamber communicating with the receiving compartment, the bottom or" said dead air chamber being spaced above the bottom of said receiving compartment while the upper portionsot said compartment and chamber are provided with screened air outlets, and a combined brush and fan in said tan compartment for sweeping the street and blowing the sweepings into, said receiving compart- .ment and said dead air chamber.

' 3. A street sweeping machine comprising a wheeledhousing having a receiving coinpartment provided with a door and with a horizontal conveyor leading to said door and forming the bottom of the compartment, together with bag racks in said coinpartment supported on said conveyor, and means for moving said conveyor after opening of said door.

4. A street sweeping machine comprising a wheeled housing having a receiving compartment provided in one side with an inlet, and means for blowing sweepings through said inlet into the compartment; together with a honey-comb of bag supporting frames extending across said compartment in a common plane inclined upwardly from the upper edge of the afore said inlet.

5. A street sweeping machine comprising a receiving compartment having an inlet in one side and means for blowing sweepings through said inlet into said compartment, together with a plurality of bag racks in said compartment each including a rec tangular leg-supported frame having side bars of arched transverse section the side bars of each frame lapping those of adjacent frames, and means for holding the bags open with their upper edges under said side bars.

6. A street sweeping machine comprising a housing divided into a brush compartment the sweepings into said receiving compartment, the portion of the peripheral wall of said casing, at the edge of the bottom opening toward which the brush bristles travel, being provided with a dust pan consisting of two pairs of side members hinged together and hinged to said edge, 'a pliable bottom extending between and secured to said side members, and means for swinging said dust pan upon its hin es as required.

In testimony whereof i have hereunto set my hand.

' CHARLES WALTER LUND. 

